Electrode mount



1935. V T. A. STERNBERG ,5 v

ELECTRODE MOUNT Filed April 6, 1935 INVEI \ITOR THEODORE A. STERNBERGAITORNEY Patented Oct. 1935.

ELECTRODE MOUNT Theodore A. Sternberg, Newark, N. 8., assignor,

by mesne assignments, to Radio Corporation of America, New York, N. Y.,a

Delaware corporation of Application April 6,1935, Serial No. 15,006

2 Claims.

This invention relates to electron discharge devices employing all-metalenvelopes, and is particularly directed to improvements in the electrodesupporting means.

In radio tubes with metal envelopes enclosin an electrode assembly ithas been found desirable to assemble some, at least, of the electrodesinto a unitary structure which is afterwards positioned inside theenvelope. metal tube the envelope comprises a metallic cup-shaped memberand a metal disc or header welded or brazed gas-tight to the lip or rimof the cup shaped member, and the electrode assembly is supported uponthe header.

It is an object of my invention to support the electrode assembly veryrigidly on the header by supporting means that is rugged and easy tomanufacture.

A full understanding of my invention may be had by referring to theaccompanying'drawing in which Figure 1 is a perspective view of detailsof my invention; and Figure 2 is a partly sectional view of a tubeembodying my invention.

As shown in Figure 2, the tube has a metal envelope comprising acup-shaped member I and a flanged metal disc 2 secured gas tight to theflared rim of the cup-shaped member. Mounted inside the envelope is aunitary electrode assembly which, merely as an example, is shown as agrid electrode 3 and a cathode 4 held between insulating end spacers 5and an anode 6, shown as'separately supported upon the header, but whichmay also be a part of the unitary electrode assembly if desired.

' In accordance with my invention I prefer, as best shown in Figure l,to support the unitary electrode assembly on a U-shaped bracket securedto the. header and preferably made from a single piece of heavy wire orround stock bent to form a bracket having supporting side rods 1 and 8which carry the spacers 5. Side rods 1 and 8 are joined at their lowerends by a horizontal portion of the wire stock which is suitablysecured, as by welding, to the header. To. lend rigidity to theelectrode supporting means I prefer to extend the bearing surfacebetween the bracket and the header by bending the horizontal portion ofthe wire stock perpendicularly lateral to the-plane thru the side rodsto form a curved footing member 9. with a wide footing as thus In oneform of allformed, the side rods are eifectively braced against tiltingin any direction. That is, by securing the rods to the header at severalpoints along portion 9 as by spot welding, the upstanding ends 1 and 8are rigidly and accurately, fixed 5 in a plane perpendicular to thesurface of the header, and by virtue of the laterally extending loop 9the side rods I and 8 are stably anchored in a fixed vertical plane.

A tube constructed in accordance with my ini0 vention may be assembledvery easily and conveniently by securing the electrode assembly, as bestshown in Figure 2, to the upper ends of side rods 1 and 8, the assemblyinserted in the open end of the cup-shaped portion I of the envel5 lope,and the rim of said portion and the edge of the header sealed togetherby welding or brazing. i

' -1't will be obvious to those skilled in the art that atubeconstructed in accordance with my invention aifords a rigid andaccurate positioning and supporting means for the electrode assemblywithin the envelope. It will be obvious, further, to those skilled inthe art that various modifications may be made .in my invention withoutdeparting from the scope thereof. It is accordingly desired that myinvention be limited only by the prior art and by the accompanyingclaims.

I claim:

1. In a discharge device, an envelope with a flat end portion, anelectrode assembly of the unit mount construction, supporting means forsaid assembly comprising two upstanding .par- 0 allel rods joined attheir lower {ends by an in- "5 tegral portion of the rods to said flatportion of the envelope, and means for securing said electrode assemblytothe upper ends of said rods.

2. In a discharge device, an envelope with a flat end portion, electrodesupporting means comprising a U-shaped rod with parallel up standingportions and a horizontal tying portion a at the lower ends of saidupstanding portions: said tying portion being laterally bent 'in' aplane normal to the plane thru said upstanding portions and secured tothe flat portion of said envelope, and an electrode secured to theupstanding portions of said rod.

THEODORE A. s'rERNBERG.

